Presença e qualidade de sementes esverdeadas de soja na região sul do Estado do Mato Grosso do Sul

Rangel, M. A. S.; Minuzzi, Andréia; Pierezan, Luciane; Teodósio, Tiara Kesli Conticelli; Ono, Fábio Benedito; Cardoso, Paulo César

doi:10.4025/actasciagron.v33i1.4852

Cited by 6 publications

(8 citation statements)

References 3 publications

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“…Chlorophyll degradation begins with hydrolysis of the phytol group, resulting in chlorophyllide (green), which is more soluble in water than chlorophyll. Subsequently, pheophorbide is formed due to loss of thephytol group and Mg +2 , giving rise toa greenbrown color.Thereafter, oxidative transformations occurs, generating colorless degradation products, which result in the transition from a greenish color to the normal yellowish color of mature soybeans (PÁDUA et al, 2009;RANGEL et al, 2011). Thus, the effects of meteorological conditions on the incidence of this physiological problem was evidenced.…”

Section: Resultsmentioning

confidence: 99%

“…Stressful situations such as intense competition among plants, high temperatures, and dry periods during maturation may affect or even terminate chlorophyllase activity prior to complete chlorophyll degradation (RANGEL et al, 2011). The frequency of greenish soybeans in a batch is unstable and depends on the type, intensity, and period when stressful conditions occur (FRANÇA NETO et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Size, chlorophyll retention and protein and oil contents of grains from soybean plants grown in different spatial arrangements

Werner

Balbinot

Ferreira

et al. 2017

SCA

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The spatial arrangement of soybean plants, determined by row spacing and seeding rate, affects the intraspecific competition for water, light, and nutrients, as well as plant architecture and grain development, quality, and chemical composition. The aims of this study were to evaluate the effect of row spacing and seeding rate on the grain size produced, and the influence of these three factors on chlorophyll retention and protein and oil content in grain. Two experiments were conducted in the 2013/14 and 2014/15 growing seasons, using a 4 × 3 factorial randomized block design with three replications. Four different row spacings [20 cm (narrow row), 50 cm (conventional), 20/80 cm (twin rows) and crossed lines (50 cm)] and three seeding rates (150, 300, and 450 thousand viable seeds ha -1 ) were evaluated. The grains were classified by size using oblong sieves and then the effects of spatial arrangements and size of grain on the percentage of green grains and protein and oil contents were evaluated. Higher plant densities were associated with larger grain size, whereas the effects of spacing between the rows on the grain size varied between growing seasons. The arrangement in cross-rows and high plant density produced a higher percentage of green grains under weather conditions favorable to the development of this attribute. The effects of plant spatial arrangements on the contents of protein and oil in grains were variable, and it was not possible to determine whether the spatial arrangement of plants had an effect on the levels of protein and oil in grains. Larger grains had higher protein content, but oil contents were not affected by grain size. Key words: Glycine max L. Grain quality. Green grains. Row spacing. Seeding rate. ResumoO arranjo espacial de plantas de soja, determinado pelo espaçamento entre as fileiras e pela densidade de semeadura, afeta a competição intraespecífica por água, luz e nutrientes, bem como a arquitetura da planta, podendo influenciar na formação, qualidade e composição química dos grãos produzidos. Os objetivos do trabalho foram avaliar o efeito do espaçamento entre fileiras e da densidade de semeadura no tamanho dos grãos produzidos e qual a influência desses três fatores na retenção de clorofila e nos teores de proteína e óleo nos grãos. Dois experimentos foram conduzidos nas safras 2013/14 e 2014/15, com delineamento de blocos casualizados, em esquema fatorial 4x3, com três repetições. Foram avaliados quatro espaçamentos entre fileiras: 20 cm (reduzido), 50 cm (convencional), 20/80 cm (fileira dupla) e 50 cm cruzado e três densidades de semeadura (150, 300 e 450 mil sementes viáveis ha -1 ). Os grãos produzidos foram classificados em peneiras de crivos oblongos. Após, avaliaram-se os efeitos do arranjo espacial e do tamanho dos grãos sobre a porcentagem de grãos verdes e os teores de proteína e óleo. As maiores densidades de plantas possibilitam a formação de grãos com maior tamanho, enquanto os efeitos de espaçamentos entre as fileiras sobre o tamanho dos grãos são vari...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Size, chlorophyll retention and protein and oil contents of grains from soybean plants grown in different spatial arrangements

Werner

Balbinot

Ferreira

et al. 2017

SCA

View full text Add to dashboard Cite

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“…Under normal conditions, the chlorophyll content decreases during the maturation process due to the activity of the chlorophyllase enzyme, which degrades the chlorophyll, forming the yellowish color of the grains or seeds. Therefore, when the grain maturation process is forced by the premature death of the plant, the chlorophyllase enzyme may cease its activity before all the chlorophyll is degraded, resulting in the formation of greenishlooking grains (Rangel et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

Economic and Agronomic Positioning of Fungicides in Conditions of Water Deficit in Soybean Cultures

Carvalho

Loro

Schmidt

et al. 2022

Trop Subtrop Agroecosyst

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Background. The management of diseases in soybean crops demands a great economic cost with fungicide applications. Therefore, unnecessary or excessive applications can promote negative environmental results. Therefore, understanding the weather conditions and the development of diseases in the crop is essential to avoid the unnecessary use of fungicides, consequently reducing costs and ensuring the sustainability of the activity. Aim. The aim is to identify which yield components are quantitatively affected, and which aspects of the chemical composition of the grains are qualitatively influenced by fungicide management, in addition to relating the cost-benefit rate of sequential applications or previously stipulated management in the soybean crop, as well as their economic effects under water deficit conditions. Methodology. The trial was carried out using a randomized block design composed of 4 replications. The trial consisted of 5 kinds of fungicide management, defined by the time and number of applications, during the development cycle of the Lança cultivar, in the 2019/2020 crop season. Soybean agronomic traits and nutritional attributes were evaluated. Results. Unfavorable climate conditions contributed to the low rate of Asian rust infection during the soybean development cycle. The different kinds of fungicide management influenced soybean performance for the main agronomic variables studied. For the chemical composition of the grains, there was no statistical difference in relation to the different kinds of fungicide management. Implications. The results indicate that the management of fungicides must be carried out according to the meteorological conditions of the year of cultivation. Conclusion. Management without fungicide application maximized grain yield and promoted the highest economic return.

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“…Immature grains are those with oblong shape and green color due to an incomplete physiological development. These grains have high chlorophyll content in the cotyledons (Zorato et al, 2007), which compromises the quality and volume of oil (Rangel et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

Comparison of equipment for grain sampling

Quirino¹,

Resende

Fonseca

et al. 2019

Rev. bras. eng. agríc. ambient.

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Grain sampling requires the use of appropriate and accurate equipment. This study aimed to compare grain samplers, manual and mechanical, used in the sampling of soybean loads, during their reception by storage units. The used devices were the manual sampler with 1.80 m length and three opening stages, 2.10 m length and three opening stages; and 2.10 m length and one opening stage, besides the mechanical sampler (pneumatic) and the pelican sampler. The analyzed parameters were the contents of impurity, broken grains, pods, immature grains, and moisture. The significance of effect of treatment was determined by F Test and the means were compared by Tukey test (p < 0.05). The devices used for sampling of soybean grains in vehicles, during their reception by storage units, affect the determination of broken grains, pods and immature grains. However, there was no difference between the types of sampling equipment in the determination of impurity content, and the pelican sampler collected greater percentages of pods and immature grains from the sampled vehicles.

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Presença e qualidade de sementes esverdeadas de soja na região sul do Estado do Mato Grosso do Sul

Cited by 6 publications

References 3 publications

Size, chlorophyll retention and protein and oil contents of grains from soybean plants grown in different spatial arrangements

Size, chlorophyll retention and protein and oil contents of grains from soybean plants grown in different spatial arrangements

Economic and Agronomic Positioning of Fungicides in Conditions of Water Deficit in Soybean Cultures

Comparison of equipment for grain sampling

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